The invention discloses a functional marker associated with
drought resistance of rape in the
seedling stage and application of the functional marker. The sequence of the functional marker is as shown in SEQ ID NO:1, and the molecular weight is 465 bp. Application of the functional marker in drought-resistant
seedling breeding of rape includes the steps that firstly, the
DNA of a rape
plant is extracted; secondly, PCR amplification is conducted, wherein the primer sequence F is 5'-TGAGGCTGATAGGATACTGG-3', and the primer sequence R is 5'-CCACGGGCACCTACATTA-3'; thirdly, after the amplification product is subjected to electrophoretic separation with
agarose gel with the concentration being 1.5%, it is predicted that draught resistance of the rape
plant is good when a specific band of the functional marker with the molecular weight being 465 bp occurs, and it is predicted that draught resistance of the rape
plant is poor when the specific band of the functional marker with the molecular weight being 465 bp lacks. The new
genetic marker is provided for genetic improvement of
drought resistance of the rape in the
seedling stage, the problems that a conventional seedling breeding method is large in
drought resistance identification
workload, the period is long and the method is influenced by the environment easily are solved, selection efficiency of drought resistance seedling breeding of rape is remarkably improved, and the seedling breeding progress of new varieties is accelerated.